What cyclists should never do

They should never listen to their music and ride in the middle of the road. I don't care if it is a residential street (which this case it was) or not. Not only was HE doing this but he was riding as slow as molasses. So the corner I turn at is coming up and I think I can drive around him. But no, he has to slowly cut me off, nearly running into me. Now I don't normally use my horn but in this instance I did. People, don't listen to your music while riding in traffic, how hard is that.